Cushion for diaphragms of telephonic and like instruments.



W. P. STUNZ.

CUSHION FOR DIAPHRAGMS 0F TELEPHONIG AND LIKE INSTRUMENTS.

APPLICATION FILED SEPT. 2s, 1912.

, 1,062,559, Patented May 20,1913.

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UNITED sTATEs PATENT oEEioE.

yWILLIAM PRESTON STUNZ, OF LANSDOWNE, MARYLAND, ASSIGNOR T0 GEORGE 7' REGESTER WEBB', OF BALTIMORE, MARYLAND.

CUSHION FOR DIAPHRAGMS OF TELEPHONIC AND LIKE INSTRUMENTS.

Specication of Letters Patent.

, Patented May 20,1913.

Application filed September 23, 1912. Serial No. 721,783.

To all 'whom may concern Be it known that I, -WILLIAM PRESTON S'IUNZ, a citizen of the United States, residing at Lansdowne, in the county of Baltimore and State' of Maryland, have invented certain new and useful Improvements in Cushions for Diaphragms of Telephonie and Like Instruments; and I do declare the following to be a full, clear, and exact description of the invention, such as will en-A able others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to mountings for the diaphragms of telephonie and like inst-ruments, and hasfor its objectto produce a mountingwhichv will afford a greater amplitude of action ,or movement of the diaphragm and provide greater and more uniform elasticity than prior elastic mountings and also serve to prevent deterioration with a e. n

gTo the accomplishment of the foregoing and such other objects as may hereinafter appear the invention consists in an elastic mounting having features or characteristics hereinafter described and sought to be defined by the claims, reference being had to the accompanying drawing illustrating one of the mountings in two forms of telephonie v instruments, one form being a transmitter `portion of the scale.

and the other a receiver for purposes of illustration, and in which,I

Figure 1 is a vertical section through a transmitter of the type havingtwo movable electrodes in granular carbon cells between stationary electrodes, the movable electrodes both being connected to the diaphragm, the

' illustration being on an enlarged or magnified scale ;4 Fig. 2 is a side view of one form' of receiver comprising generally a permanent magnet with an amplifying lever mounted upon one pole of the magnet and spaced from the other pole carrying a coil and having its oppositelend bearing against a diaphragm and showing the support for a horn, the receiverbeing full size; Fig.-3\is a plan view of one form of the elastic mounting; and Fig. 4 is a perspective of a mounting on an enlarged In the drawing the numeral l designates the vmounting which is made preferably of spring or elastic Wire and is in the form of an annulus and as illustrated is preferably circular in outline although it may be of other shape in outline without departin from the invention.

The mounting comprises a number of wave formed convolutions or undulations formed of loop-members, as illustrated, the branches of the undulations of the inner circle being alternatelyV bent or'deflected upward as indicated at 2 and downwardly as indicated at 3 "so as to present the terminals of the inner circle of the branches in different horizontal planes, the outer circle of the undulations being preferably in the same plane and intermediate of the two planes diaphragm 4 and the front plate 5 of a` transmitter with some of its deflected undulations bearing against the diaphragm and the others against the plate, and the other mounting between the diaphragm and the back plate 6 of the transmitter with some of the deflected undulations bearing against the diaphragm and others against the back plate, as clearly illustrated in the drawing. In this form of transmitter the two electrodes 7 of the granular carbon cells 8 of the transmitter are connected to the diaphragm 4, but the mounting may be used for the diaphragm of any other type of 'transmitter than that illustrated and. serve the same purpose whatever be the form or type v is illustrated as between the diaphragm 13 and the plate 14 which carries tlie'member 15'for attachment of an amplifying horn. In this form Yitv will be observed that the mounting bears against only 'one side of the diaphragm, some of the fundulations of the .inner circle of the mounting bearing against the diaphragm and others against the plate la so as to afford an elastic support for the diaphragm. rlhe form of the receiver hovw ever to which the mounting for the diaphragm may be applied is immaterial as the l members of an elastic suspension or cushion having the characteristics of my mounting is the same Whateverbe vthe form of the receiver or other instrument having a vibrat.

able diaphragm. With a mounting or elastic cushion formed as specified a greater amplitude of action is obtainable than under other elastic cushions heretofore provided and a greater and more uniform elasticity throughout the entire amplitude of; action is made possible, and by reason of the mounting being made of springer elastic Wire the elasticity or resiliency; of the cushion Will not deteriorate" with age, and there need ,not be any xed attachment ot the spring cushion to any :my invention'. A

'partof the instrument and thus advantageobtained over a xed attachment of the cushion. li-have illustrated the mounting as circular in loutline because that is the preferred form but itis obvious that a mounting other than circular in outline may be made having the essential characteristics of my invention. While'll preferto makethe mounting of spring Wire., yet the same may be made of other suitable material and formed with the characteristic features of Having described my invention and set forth its merits AWhatl claim is l. A cushion for the `diaphragm. or a telephonic or like instrument comprising anv noeae'ee v elastic loop-formedl annulushaving undulatory branches, the inner portions of Which are deilected. v

5 A cushion for ythe diaphragm of a telephonic or like instrument comprising an elastic loop-formed annulus having undulatory branches, the inner portions of which are deflected in opposite directions.

6. A cushion for thediaphragm of a telephonic or like instrument comprising an elastic annulus having undulatory branches,

-the inner ,portions of Which are deflected to dierenty 1lm rizontal planes and the outer portions lyingl in substantially the same.

plane with each other. y

7. ,A cushion for the diaphragm of a tele phonic or like instrument comprising a spring metal loop-formed annulus having undulatory branches, theinner portions of which are deflected into dierent planes.

lin testimony whereof ll alix my signature in presence oi' two Witnesses.

WlLlLAM- PRESTUN. STUNZ.

' FRANK GosnnLL, Jn,

WILMAM PEPPER CoNsTABLn. 

